My only problem with Crash in Smash Bros would be that he was always more of a Sony character than a Nintendo character, though I did have a lot of fun with Crash Bandicoot N-Tranced on the GBA. Mind you, I quite liked having Solid Snake in Brawl and the majority of his games are Playstation-exclusives, so maybe Crash could work. Personally I'd just like to see Crash back in action again, been ages since he last had a game and it would be nice to see another 3D platforming series coming back, since it's a pretty uncommon genre now.